Treatment and utilization of sewage and distillery or brewery wash or waste.



A. DIGKSON. TREATMENT AND UTILIZATION OF SEWAGE AN-D DISTILLERY ORBREWERY WASH OR WASTE.

' APPLIOATION FILED NOV. 30, 1910.

1,015 ,302, Patented Jan.23, 1912.

' TREATMENT AND UTILIZATION or Specification of Letters mam. P t tApplication filed Hovember so, 1910. Serial no. 584,956.

PATENT oFrIo OI- DUIBLIN, IRELAND.

SEWAGE Aim msrrnmmr on. nnnwnar WASH on was. r

To all whom it may concern;

Be it known that I, ALExANDnR DIOKSON, of 15 Parliament street, Dublm,Ireland,

have invented. new and useful Improve-- Inents Relating to the Treatmentand Utilization of Sewage Wash or Waste;

that the following is a full, clear, and exact descriptionof the same.

This invention has reference to the treatment and utilization of refusesuch as sew age and distillery or brewery wash or waste and has for itsobject nnproved means whereby the organic and nitrogenous matterscontained in such refuse 'may be separated therefrom so as to renderthemcapable of being usefully employed. p

In the treatment of distillery or brewery wash or waste the nitrogenous,matter se arated therefrom may be employed as a ertilizer or manure.

In carrying my invention into practice the separation of the nitrogenousmatter is effected by adding to the sewage or to the distillery wasteabout one half per cent. of brewers yeast preferably at a temperature ofabout 65 degrees Fahrenheit. In treating sewage the fermentation thusset up separates the nitrogenous matter in the sludge from the sand andliquor and forces it to the top from whence it may be collected andutilized for various purposes. The

treatment of the sewage or thin mixture and the sewage sludge which is alittle thicker in consistency is the same, but the preference is to workwith the sludge. In t the case of creamy sewage the mixture is afterwardpassed through phosphate of lime or some substance such as basic slag orboneash, in order to neutralize the aciditywhich arrests any furtherdecomposition. The acids usually found are lactic, acetic and butyricacids. Fine coal may bemixed with the separated material from the sewagesludge and pressed into briquets which may be used for heating purposesand gas distillation with recovery of ammonia. The pro portionof yeastnecessar is about one half per cent. of the sewage s udge used. About 10cwt. ordinary brewers yeast would be added to 100 tons sewage s andallowed to remain for'about 48 hours; the organic portion is then foundat the top and can be readily taken off and utilized.

in making briquets one third of fine coal and Distillery or Breweryv andI do hereby declare.

udge in a tank is mixed with two thirds of the separated material fromthe sludge and pressed into shape in any convenient manner.

The treatment of distillery wash or waste is effected in substantiallythe same manner, that is to say, a quantity of yeast in the pro portionsabove indicated is added to the -mixture after which it is agitated andallowed to stand until the nitrogenous matters are precipitated at thebottom of the tank. The liquid is then run through tricalcium phosphatein order to neutralize its acidity so that the liquid maybe run to anyoutlet stream or river without injury to fish or thelike. The tricalciumphosphate does not become dissolved so as to pass off to any extent withthe effluent but settles'as a mass which may be collected and may beeasily dried and used as a fertilizer. p

A form of apparatus suitable for use in effecting the present process,is shown by way of example in the accompanying drawing, in whichz-Figure 1 is a top plan view of the a paratus, and Fig. 2 1s a sideelevation o the same.

Referring particularly to the drawing, A indicates a tank, which inpractice has a large capacity, say about 100 tons of sewage, above whicha pipe B is disposed through which sewage or distillery wash may beconveyed to the tank A. Disposed immediately below the outlet C of pipeB is a drum D having a spout E, said drum being capable 'of rotation, soas to direct the sewage, or other liquid to be'treated, into the tank A,or so as to direct the liquid to a point without the tank A, such as adrain or stream, of any description. The drum may be revolved-bymeansof-a lever F which operates a cord G running to, and connected with, apulley H, the drum, tension bein by means of a weight posed in the lowerpart of the tank so as to remove any ortion of the liquid desired. Thetank A is referably divided into two sections, into w ich the drum D maydirect the fluids to be treated in themanner desired, by virtue of itscapability of rotation.

I claim:

1. The process of separating the nitrogenous matter from sewage andother waste liquids containing organic matter, which applied to the cordOutlets K are diswhich is connected with consists in adding brewersyeast to the liquid to betreat'ed, agitating the mixture,

allowing the mixture to stand until the said nitrogenous matter isseparated, and finally removing the nitrogenous matter from the liquid,

2. The process of separating the nitrogenousmatter from sewage anddistillery Wash, which consists in adding 'brewers yeast to the saidliquids, allowing the mixture to stand until the said nitrogenousmatteris separated, and finally removing the nitrogenous matter from theliquid. 1

The process of separating the nitrogenous matter from sewage and otherwaste liquids containing Organic matter which consists in addingapproximately one-half per cent. of brewers yeast to the li uid to v betreated, agitating the mixture, a1 owing the mixture to stand until thesaid nitrogein presence of two witnesses.

ALEXANDER DIGKSON. Witnesses:

A. G. Droxson, J. M. HALLIGAN.

